反应详情

温度

120 °C

2-Bromo-5-hydroxypyridine (3 mmol) is dissolved in DMF (10 ml) and NaH (1.4 eq., 60% suspension in liquid paraffin) is added. After 30 min cyclopentyl iodide (2.2 eq.) is added and the reaction solution is stirred 3 days at 120° C. The reaction solution is pored into water and extracted with methyl-tert.-butyl ether. The combined organic layers are dried over MgSO4 and the solvent is removed in vacuo. 2-Bromo-5-cyclopentyloxy-pyridine is obtained after column chromatography (heptane/ethylacetate) as yellow oil in a yield of 45%; HPLC (method C): 2.08 min; LC-MS (method A): 2.05 min, 241.95 (M+H+).

1. extractionextracted with methyl-tert.-butyl ether
2. dry with materialThe combined organic layers are dried over MgSO4
3. customthe solvent is removed in vacuo